/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package Contronler;

import DAO.UserDAO;
import DatabasePOJO.user;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import MD5.MD5;
/**
 *
 * @author miayeu
 */
@WebServlet(name = "DangNhap", urlPatterns = {"/DangNhap"})
public class DangNhap extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
              String action = request.getParameter("Action");
               HttpSession session = request.getSession();
        if (action != null) {
            if (action.equals("Login")) {
                String tenDangNhap = request.getParameter("u");
                String matKhau = request.getParameter("p");
                user kh = UserDAO.dangNhap(tenDangNhap, matKhau);
                matKhau=MD5.maHoa(matKhau);
       
            String sql = String.format("SELECT * FROM user WHERE TENDANGNHAP=BINARY('%s')"
                    + " AND MATKHAU=BINARY('%s')", tenDangNhap, matKhau);
            out.print("<h1>"+sql+"</h1>");
                session.setAttribute("KhachHang", kh);
                if(kh.getType().equals("1")){
                    //quản lí admin
                   response.sendRedirect("index.jsp");
                    return;
                }
                else if (kh.getType().equals("2")) {
                    //quản lí khách hàng
                    response.sendRedirect("index.jsp");
                    return;
                }
                else if(kh.getType().equals("3")){
                    //quản lí người mua hàng
                    response.sendRedirect("index.jsp");
                    return;
                }
                else {
                    request.setAttribute("Error", "Tên đăng nhập hoặc mật khẩu  không đúng");
                    request.getRequestDispatcher("index.jsp").forward(request, response);
                }

            } else if (action.equals("Logout")) {
  
                session.removeAttribute("KhachHang");
                response.sendRedirect("index.jsp");
                return;
            }

        }
        } finally {            
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
